In this paper, a new zero voltage switching[ZVS] voltage source inverter is presented to overcome the main problems of the resonant dc-link type inverter with discrete pulse modulation[DPM], such as subharmonic problem and high voltage stress(1.3~1.8p.u.). The proposed ZVS inverter adopts a new parallel resonant dc-link and has pulsewidth modulation capability with minimum device voltage stress(1.0p.u.). In addition, the design and control of the proposed inverter are fairly simple. Operational principle, detailed analysis and design procedures are described. Simulation results verifying the principle of operation are presented. A 7.5KVA prototype inverter is implemented and tested with 20KHz switching frequency.
